Effect of temperature and solvent on the ultrasonic velocity and allied acoustical parameters of the epoxy oleate of 9,9′-bis(4-hydroxyphenyl) anthrone-10 solutions

摘要

Density (ρ), viscosity (η) and ultrasonic velocity (U) (2 MHz) of the pure solvents (chloroform, THF and 1,4-dioxane) and solutions of the epoxy oleate of 9,9′-bis(4-hydroxyphenyl) anthrone-10 (EBANO) have been investigated at 303, 308 and 313 K. Acoustical parameters such as specific acoustical impedance (Z), adiabatic compressibility (κ _a), intermolecular free path length (L _f), classical absorption coefficient (α/f ~2)_(cl) and viscous relaxation time (τ) have been determined from the ρ, η and U data and are correlated with concentration. A fairly good to excellent correlation between a given parameter and concentration is observed at all temperatures and solvent systems studied. Linear or nonlinear increases or decreases of acoustical parameters with concentration and temperature indicated the existence of strong molecular interactions.